Yarn transfer tail forming and controlling apparatus



Jan. 19, 1965 ONEILL VANNEMAN, SR 3,166,262

YARN TRANSFER TAIL. FORMING AND CONTROLLING APPARATUS Filed 001;. 10, 1962 2 Sheets-Sheet l INVENTOR LEIGH O'NEILL VANNEIANSR Jan. 19, 1965 ONElLL VANNEMAN, SR 3,165,262

YARN TRANSFER TAIL FORMING AND CONTROLLING APPARATUS 2 Sheets-Sheet Filed Oct. 10, 1962 =2 :23 Y mm :2: 5356 ME A! INVENTOR LEIGH O'NEILL VANNEMAN,SR

ATTORNEY United States Patent Gfifice 3,16a262 Patented Jan. 19, 1965 3,166,262 YARN TRANSFER TAIL FORMING AND CGNTROLLING APPARATUS Leigh ONeill Vanneman, Sr., Grifton, N.C., assignor to E. I. du Pont de Nemours and Company, Wilmington, Del, a corporation of Delaware Filed Oct. 10, 1962, Ser. No. 229,631 7 Claims. (Cl. 24219) This invention relates generally to the field of textile windup apparatus and more specificially to means for controlling the application of a transfer tail to a yarn package in an improved manner at high rotational speeds.

As commonly understood in the textile art, a transfer tail is a portion of the first yarn wound on a yarn support, which is so disposed as to be positively secured during the winding of the remainder of the yarn package, yet freely available for tying directly to the outer end of the yarn on another yarn package. The purpose of providing a transfer tail is to enable an uninterrupted fiow of yarn to be maintained from a depleted yarn package to a full package adjacent thereto, as in a creel or other yarn package holder on which both yarn packages are supported.

Many methods and devices for winding transfer tails on rotating yarn supports are described in the art. While these methods and devices may be satisfactory for applying transfer tails at normal winding speeds, i.e., up to several hundred yards per minute, they are generally unsuitable for this purpose at higher speeds such as 1,000 yards per minute and higher. When Winding at these high speeds it becomes very diflicult to Wind a satisfactory tail and control the tails length with any accuracy. Consequently, the prior art devices and methods have been found unsatisfactory in such applications.

It has been found desirable to accurately control the length of transfer tails since the building up of excessively long tails results in waste of yarn and inetficient handling of the yarn packages. Furthermore, the building up of a large bundle at the end of the yarn support is particularly undesirable when using a surface driven bobbin because the yarn bunch tends to push the bobbin away from the drive roll. Hence, sufiicient contact cannot be maintained to properly drive the bobbin. 7

Therefore, it is an object of this invention to provide improved means for winding transfer tails on rotating yarn supports.

Another object is to provide a means for winding transfer tails on yarn supports rotating at high speeds.

A further object is to provide a means for accurately controlling the length of the transfer tail being Wound at high winding speeds.

These objects are accomplished by an improved yarn windup apparatus generally used in combination with a means, such as a sucker gun for temporarily collecting and disposing of a moving yarn line as it is forwarded from a yarn source and comprising means for releasably holding the moving yarn line away from a traverse mechanism for a given desired interval, means for cutting the yarn after it has been aligned with and wrapped around a first portion of a yarn support, means for releasing the yarn for movement to the traverse mechanism after the desired time interval, and means for controlling the length of the time interval between cutting and releasing of the yarn to the traverse mechanism.

The objects of this invention are preferably achieved by an apparatus arrangement providing for first cutting a running yarn line in engagement with a transfer tail portion of a rotating bobbin, winding a first controlled length of a transfer tail on the transfer tail portion of the bobbin, and then shifting the yarn line in a carefully controlled manner to a main yarn portion of the bobbin to form a main yarn package and accurately control the remaining length of the transfer tail formed during the shift.

Other objects and the means for their accomplishment with become apparent from the description and discussion to follow, taken in conjunction with the drawings in which like elements in the various views are referred to by like characters of reference and in which:

FIGURE 1 is a partial perspective view of a preferred embodiment of a textile yarn windup apparatus embodying the features of this invention, certain parts being shown only partially,

' FIGURE 2 is a diagrammatic side view of the apparatus of FIGURE 1 showing portions of a yarn sucker gun structure and a moving yarn line as initially strung up prior to actuation of the yarn cutting means,

FIGURE 3 is a partial view taken along line 33 of FIGURE 2 showing the means for releasably holding the moving yarn line clear from the traverse mechanism certain parts being broken away for a clearer showing,

FIGURE 4 is a partial view taken along line 44 of FIGURE 2 showing the means for cutting the yarn line to start winding of a transfer tail with certain parts being broken away for a clear showing,

FIGURE 5 is an enlarged detail showing, partially in section, of the elements comprising the cutting means shown in FIGURE 4,

FIGURE 6 is an enlarged detail showing, partially in section, of the elements comprising the means for holding and releasing a moving yarn line shown in FIGURE 3, and

FIGURE 7 is a general schematic diagram of one arrangement of a fluid pressure control system for the apparatus of FIGURE 1.

More specificially, the preferred form of high-speed yarn windup apparatus embodying the features of this invention generally comprises a conventional supporting structure 1, a rotary drive roll 2 operatively mounted on the supporting structure 1, and at least one driven rotatable chuck element (not shown) mounted on the supporting structure for supporting a yarn bobbin 3 in frictional engagement with the drive roll 2. The windup apparatus further comprises a movable yarn traversing guide 4 supported by a traverse cam 5 mounted in the structure 1. The yarn traversing guide 4 is operatively associated with the drive roll 2 and the chuck-mounted bobbin 3 for forming the main yarn package on a main portion 6 of the bobbin 3.

As may be seen in FIGURES l and 2, a suitable portable means 7, such as a sucker gun, is used in association .with or as a part of the windup apparatus for temporarily collecting and disposing of a moving yarn line 8 asit is forwarded from a yarn source (not shown). The general arrangement of parts is such that the yarn line 8 proceeding from the yarn source to the sucker gun 7 is inherently urged toward engagement with the yarn traversing guide 4.

.In the preferred embodiment disclosed in the drawings; yarn transfer tail forming and controlling apparatus generally comprises a fixed member 9 rigidly mounted on the structure 1 by suitable means. The fixed member 9 serves as a yarn guiding and deflecting means and is positioned for holding the yarn line 8 clear of the traversing guide 4.

Also mounted on the structure 1 and cooperating with the on? fer tail portion) of the bobbin 3 against a surface por tion 13 of the fixed member 9. In a second position, as shown in phantom in FIGURE 6, the movable member ltl is retracted from its first position so as to release the yarn line 8 from the fixed members portion 13 for movement into engagement with the yarn traversing guide 4, or preferably, first into engagement with a movable yarn retarding means 14. i I i In FIGURE 2, the running yarn line 8 is shown engaging the movable member It in its first position. Phantom line, 8a, shows the yarn released by the movable member it} prior to engagement with the yarn traversing guide 4. Phantom line, "812, shows the yarn engaged with the traversing guide 4.

A preferred form of'apparatus includes an inertial yarn retarding means 14 positioned for yielding lateral engagement with a yarn line released by the movable member 1%. Preferably, the retarding means 14 functions in cooperation with a supporting bar 15 mounted in the structure 1; and, said means 14 consists of a pendulum element 16 of predetermined mass mounted, by means of a pivot pin 17, on the fixed member 9 for limited movement about the pin 17 which has a substantially horizontal axis Positioning of the pendulum element 16 is such that the released yarn line 8 must displace it or push it away in lateral movement of the yarn line toward engagement with the traversing guide 4.

Yarn transfer tail .forming and controlling apparatus further comprises a yarn cutting means 18, additional means for maintaining the movable member in its first position and for operating the cutting means 18, and means 20 opposed to the additional means to move the movable member 10 to its second position.

The yarn cutting means, shown in FIGURE 5, comprises a cutter element 21 positioned for movement internally of a cylindrical tube or so-called hollow cutter bar 22. The cutter bar 22 has an internally threaded cap 23 at one end adapted for threaded removable engagement with a mating protruding surface portion of a cutter bar holder 24 mounted on the supporting structure. Within the cutter bar holder 24 is a removably mounted single-acting air cylinder 25 (Air-Mite Devices No. MC-l) with its piston shaft 26 attached to a blade holder 27 which in turn holds the blade or cutter element 21 by means of suitable cap screws 28- and is adjustable by a set screw 29. The air cylinders piston shaft has a bushing, secured thereto by means of a set screw for frictionally engaging the inner surface of the hollow cutter bar. Thus the cutter element 21 moves with and in response to movement of the piston shaft 26.

The cutter bar 22 further comprises a recessed outer surface portion, or cutter slot 32, which is positioned in the cutter bar 22 for alignment with the bobbins other portion 12 and the surface portion 13 of the fixed member 9. This cutter slot 32 intersects witha longitudinal slot 31 formed in a second stationary cutter elementSt) fitted and fixedly mounted within the hollow portion of the cutter bar 22 by a suitable cap screw 33. The fixed cutter element 30' having formed therein a transverse slot extending through the longitudinal slot 31, the fixed second cutter element 30 being adapted to receive and slidably engage the first movable cutter element 21in the transverse slot so as to cooperatively establish a cutting zone relativea yarn line 8 positioned in the lowerpart of the cutter slot 32.

An additional means, such as a fluid pressure system, is mounted on the structure cooperating with the movable member 10 by means of conduits 35 for maintaining the movable member 10 in its first' position. The fluid pressure mean-s also cooperates with the movable cutter element 21 by means of conduit 36 for operating the cutter element 21 to sever the yarn line 8 when the yarn line 8 is engaged with both the fixed member 9 and the bobbin 3 and'is positioned in the longitudinal slot 31 of the cutter bar. The fluid pressure means is so arranged and constructed that it is rendered inoperative to maintain the movable member 10 in its first position in response to operation of the movable cutter element 21.

The fluid pressure means shown schematically in FIG- URE 7 utilizes compressed air as the fluid medium and generally comprises a commercially available foot-operated four-way air control mechanism or valve 34 manur'actured by Air-Mite Devices, Inc. and sold under Catalog No. V4208. This valve 34 may be mounted remote from the yarn windup apparatus for ease of operation by an operator when a new yarn winding is to be commenced. The fluid pressure system is suitably connected to a conventional compressed air source .(not shown) connected, bysuitabl e piping, to the air control valve 34. The single'acting air cylinders 11, 25 operatively communicate 'with the valvefid by separate conduits 35, as and fittings. The conduit connecting the valve 3 3 and the exhaust for the air cylinder 11 is provided with an orifice of predetermined reduced dimension relative the so-called free exhaust piping which leads or is vented to the atmosphere. This orifice is indicated at reference numeral 89 in the conduit labeled controlled exhaust from 11. i

Operation of the fluid pressure means is such that the valve 34 continuously receives supply air which turn is directedto the movable members cylinder 11 so long as the valve foot pedal is in an -at rest position. When the operator depresses the pedal, supply air is redirected to the cutter elements cylinder 25 which serves to operate the element 21 to sever the yarn line 3. At the same time that the supply air is being redirected to operate the cutter element 21, the fluid pressure means is rendered moperative to maintain the movable member 1% in. its first position. The air supply to the movable members cylinder 11 is closed off and the cylinders 11 associated exhaust conduit, controlled by restriction device 553, is opened to gradually bleed-01f the pressure supplied to cylinder 11. After sufiicient ai-r bleed-off and pressure drop in cylinder 11 (during which time the operator must keep the pedal depressed) a helical return spring 29 in the cylinder 11 moves the movable member iii to its second or inoperative position which releases the yarn line 8 into engagement with element 15 and/or element 1 6.

The means opposed to the fluid pressure means preferably comprises a resilient means such as a helical return spring 20 mounted within the air cylinder 11 of the yarn releasing means in cooperation with the movable member 10, and operative to move the movable member 10 to its retracted or second position a, predetermined time interval after operation of the movable cutter ele ment 21 by the fluid pressure means. It may be seen that the air cylinder 25 associated with the cutter element 21.-

a-lso has a helical return spring for re-setting the posi tion of, or retracting, the element-21 when the foot pedal is released after the cutting action has been accomplished, for repeating the transfer tail forming and controlling operation with respect to a newly positioned yarn bobbin.

The procedure for forming and controlling yarn transfer tails with the appaartus of this invention, and the operation of this apparatus using compressed air as the pressurized fluid medium is as follows.

The running yarn line 8 is collected from the yarn source by means of a sucker gun 7. By manipulating the sucker gun 7, the yarn 8 is guided downwardly between the fixed member 9 and the rotating drive roll 2. The fixed member 9 serves to hold the yarn line 8 clear of the moving yarn traversing guide d. The yarn line 8 is then guided by the sucker gun 7 under the drive roll 2, up between the drive roll 2 and the yarn bobbin 3, then over and around the bobbin 3 for approm'mately one full turn. During these manipulative operations with a sucker gun 7, the bobbin 3 does not have to be disengaged from thedrive roll. And preferably, the yarn bobbin 3, the drive.-

toll 2, and the yarn line 8 are all operating at full yarn Windup speed during yarn string-up. Continuing, the yarn line 8 engaged and held by the fixed member 9, is guided to the end surface portion 13 of the fixed member 9 and onto the yarn releasing means 10 which is being continuously maintained in its first position by the fluid pressure means. At approximately the same time, the sucker gun 7 is moved so that a portion of the yarn line running between the bobbin 3 and the gun 7 is directed into the longitudinal slot 31 of the cutter bar 22.

The next step is for the operator to depress the foot pedal for valve 34. This action applies air under pressure to cylinder 25 which causes the movable cutter element 21 to sever the yarn line between the bobbin 3 and the sucker gun 7 so that winding of a transfer tail on the other portion 12 of the bobbin 3 can begin. At the same time, the air pressure in the movable members cylinder 11 is bled off through restriction element 89 in the controlled exhaust conduit and is reduced over a predetermined time interval to perm-it the spring 20 to move the member 10 to its second, or inoperative, position to release a trailing portion of the yarn linefi. After the yarn line 8 is released, the operator releases the pedal which action cuts off the controlled exhaust conduit and allows the build-up of pressure in conduit 35 and cylinder 11 to return the member 10 to its first (or operative) position, and which vents the air pressure supplied to conduit 36 and cylinder 25 so that spring 37 can move the cutter element 21 to its original starting (or retracted) position clear of the cutter slot 32.

Several turns of yarn are made on the yarn bobbin 3 before the spring tension on the air cylinders piston causes the piston, or movable member 10, to retract sufliciently to release the threadline onto supporting bar 15. The yarn line 8, upon dropping past the surface portion 13 of the fixed member 9 starts to move laterally towards the center of the drive roll 2 and in the direction of the traversing guide 4. In this lateral movement, the yarn line 8 engages and pushes the pendulum element 16 out of its lateral path of movement. The inertia of the pendulum element 16 is suflicient to retard lateral rate of movement of the yarn line for a predetermined time period so that a desired helix angle is obtained on the yarn bobbin 3 between its other portion 12 and its main portion 6. A delay of 0.0167 to 0.033 second is usually sufficient at a windup speed of 2,000 yards per minute. The delay is governed by the configuration and mass of the pendulum 16, which may be changed as desired. Upon clearing the pendium element 16, the yarn line continues to move laterally across the supporting bar 15 and into the normal traversing path .Where it is picked up by traverse guide 4 for guided traversed application on the main portion 6 of the bobbin 3 mounted on the rotatable chuck.

Thus a first controlled length of the transfer tail is established by controlling the time interval between yarn 8 severance and yarn 8 release by the movable member 10. This time interval is controlled by the size of the exhaust orifice, the normal level of operating air perssure, and the tension on the return spring 20. The orifice size is easily changed to give the desired time lag. Using an air pressure of 90-100 lbs. per square inch in a commercially available inch inside diameter air cylinder 11 having a capacity of .055 cubic inch, an orifice diameter of 0.040 inch has been found to give good results.

A particular advantage of the apparatus of this invention is the control afforded by the inertial means or pendulum element 16 over the remaining length of transfer tail formed during the shift. In the present apparatus, the remaining length of transfer tail is governed by the inertia of the pendulum element 16.

This apparatus is particularly suitable for use with a print roll type of windup, as shown, where the yarn 8 is traversed on the drive roll 2 rather than directly on the bobbin 3. With this particular type of windup, where 6 a drive roll 2 is used to rotate the bobbin- 3, it is sometimes desirable that the drive roll 2 have a shallow circumferential groove 38 opposite the transfer tail portion of the yarn bobbin 3 so that the bobbin 3 is not pushed away from the drive roll 2 during formation of the transfer tail It is understood that the preceding description is merely intended to be that of a preferred embodiment of my invention, and that many variations will be apparent to thoseskilled in the art without departing from the spirit and scope of the invention as defined in the claims wherein, I claim:

1. An improved high-speed yarn windup apparatus for forming yarn packages with transfer tails of accurately controlled lengths on rotating yarn supports, said apparatus adapted for use in combination with means for temporarily collecting and disposing of a running yarn line as it is forwarded from a yarn source, said apparatus comprising, in combination, a supporting structure, a rotary drive roll operatively mounted on said structure, at least one driven rotatable chuck element mounted on said structure for supporting a yarn bobbin in frictional engagement with said drive roll, a movable yarn traversing guide mounted on said structure operatively associated with said drive roll and a bobbin on said chuck element to form a yarn package on a main portion of such a bobbin, the arrangement of parts being such that a yarn line proceeding from a yarn source to the means for collecting and disposing of the yarn is urged toward engagement with said traversing guide, a yarn guiding and deflecting means mounted on said structure constructed and arranged to engage and hold a running yarn line clear of said yarn traversing guide and in operative alignment with another portion of a bobbin on said chuck, a movable yarn releasing means mounted on said structure in cooperation with said yarn guiding and deflecting means for movement between a first position in which said yarn line is cooperatively, releasably engaged by the releasing means and the guiding and deflecting means and maintained in alignment with said other portion of said bobbin, and a second position in which said yarn line is released for movement into engagement with said yarn traversing guide for guided traversed application on said main portion of a bobbin mounted on said rotatable chuck, a yarn cutting means mounted on said structure positioned adjacent a running yarn line for operative engagement therewith when said yarn line is in engagement with said guiding and deflecting means and a bobbin on said chuck, a fluid pressure means mounted on said structure cooperating with said releasing means for maintaining the releasing means in its first position, said fluid pressure means also cooperating with said cutting means for operating the cutting means to sever a running yarn line engaged with said guiding and deflecting means and a bobbin on said chuck to commence windup of yarn on said other portion to form a transfer tail, said fluid pressure means comprising a control mechanism for rendering said fluid pressure means inoperative to maintain said releasing means in its first position in response to operation of the cutting means, and a means opposed to said fluid pressure means and supported on said structure in cooperation with said releasing means and operative to move the releasing means to its second position a predetermined time interval after operation of the cutting means so that the yarn line transfer tail length is accurately controlled.

2. The improved apparatus of claim 1 which further comprises a movable yarn retarding means mounted on said structure adjacent a running yarn line for yielding lateral engagement with a running yarn line released by said movable yarn releasing means and moving laterally in the direction of said retarding means, said retarding means further adapted to release said yarn line a predetermined time interval after its engagement therewith to permit the yarn line to continue its lateral movement toward engagement with said yarn traversing guide for 4' guided traversed application on said main portion of a bobbin mounted on said rotatable chuck element; and. said means opposed to said fluid pressure means is a resilient means.

3. The improved apparatus of claim 2 wherein said yarn guiding and deflecting means comprises a fixed member mounted on said structure having a surface portion in operative alignment with said other portion of a bobbin on said chuck element, said surface portion of said fixed member adapted for engagement with a running yarn lineto hold said running yarn line clear of said yarn traversing guide; and wherein said movable yarn releasing meansv comprises a movable member mounted on said structure adjacent said surface portion and cooperating with said. fixed member for movement between a first position in which said yarn line is cooperatively, releasably engaged against the fixed members surface portion by the movable member and in alignment with said other portion of said bobbin, and a second position in which said yarn line is released from said fixed members surface portion for movement into engagement with said movable yarn retarding means.

4. The improved apparatus of claim 3 in which said yarn cutting means comprises a cutter element mounted on said structure positioned adjacent a running yarn line in engagement with said surface portion of said fixed member and a bobbin on said chuck, said cutter element movable in a lateral direction relative said yarn line for operatively engaging and cutting the yarn line upon operation of said fluid pressure means.

5. Yarn transfer tail forming and controlling apparatus adapted for use in combination with a high-speed yarn windup apparatus, said yarn windup apparatus comprising, in combination, a supporting structure, a rotary drive roll operatively mounted on said structure, at least one driven rotatable chuck element mounted on said structure for supporting a yarn bobbin in frictional engagement with said drive roll, means for temporarily collecting and disposing of a running yarn line as it is forwarded from a yarn source, a movable yarn traversing guide mounted on said structure operatively associated with said drive roll and a bobbin on said chuck element to form a yarn package on a main portion of such a bobbin, the arrangement of parts being such that a yarn line proceeding from said yarn source to said means for collecting and disposing of the yarn is urged toward engagement with said traversing guide; said yarn transfer tail forming and controlling apparatus comprising, in combination, a yarn guiding and deflecting means mounted on said structure and constructed and arranged to engage and hold a running yarn 8 chuck, a movable yarn releasing means mounted on said structure in cooperation with said yarn guiding and deflecting means for movement between a first position in which said yarn line is cooperatively, releasably engaged by the releasing means and the guiding and deflecting means and maintained'in alignment with said other portion of said bobbin, and a second position in which said yarn line is released for movement into engagement with said yarn traversing guide for guided traversed application on said main portion of a bobbin mounted on said rotatable chuck, a yarn cutting means mounted on said structure positioned adjacent a running yarn line for operative engagement therewith when said yarn line is in engagement with said guiding and deflecting means and a bobbin on said chuck, an additional means mounted on said structure cooperating with said releasing means for maintaining the releasing means in its first position, said additional means also cooperating with said cutting means for operating the cutting means to sever a running yarn line engaged with said guiding and deflecting means and a bobbin on said chuck to commence windup of yarn line clear of said yarn traversing guide and in operative I alignment with another portion of a bobbin on said on said other portion to form a transfer tail, said additional means comprising a control means for rendering said additional means inoperative to maintain said releasing means in its first position in response to operation of the cutting means, and a means opposed to said additional means and supported on said'structure in cooperation withsaid releasing means and operative to move the releasing means to its second position a predetermined time interval after operation of the cutting means so that the yarn line transfertail length is accurately controlled.

6. The improved apparatus of claim 5 wherein said additional means is a fluid pressure means.

7. The improved apparatus of claim 6 wherein a movable yarn retarding means is mounted on said structure adjacent a running yarn line for yielding lateral engagement with a running yarn line released by said movable yarn releasing means to move laterally in the direction of said retarding means, said retarding means further adapted to release said yarn line a predetermined time interval after its engagement therewith to permit the yarn line to continue its lateral movement toward engagement with said yarn traversing guide for guided traversed application on said main portion of a bobbin mounted on said rotatable chuck element; and wherein said means opposed to said fluid pressure means and cooperating with said releasing means is a resilient means.

References Cited in the file of this patent UNITED STATES PATENTS 2,481,031 McDermott Sept. 6, 1949 

1. AN IMPROVED HIGH-SPEED YARN WINDUP APPARATUS FOR FORMING YARN PACKAGES WITH TRANSFER TAILS OF ACCURATELY CONTROLLED LENGTHS ON ROTATING YARN SUPPORTS, SAID APPARATUS ADAPTED FOR USE IN COMBINATION WITH MEANS FOR TEMPORARILY COLLECTING AND DISPOSING OF A RUNNING YARN LINE AS IT IS FORWARDED FROM A YARN SOURCE, SAID APPARATUS COMPRISING, IN COMBINATION, A SUPPORTING STRUCTURE, A ROTARY DRIVE ROLL OPERATIVELY MOUNTED ON SAID STRUCTURE, AT LEAST ONE DRIVEN ROTATABLE CHUCK ELEMENT MOUNTED ON SAID STRUCTURE FOR SUPPORTING A YARN BOBBIN IN FRICTIONAL ENGAGEMENT WITH SAID DRIVE ROLL, A MOVABLE YARN TRAVERSING GUIDE MOUNTED ON SAID STRUCTURE OPERATIVELY ASSOCIATED WITH SAID DRIVE ROLL AND A BOBBIN ON SAID CHUCK ELEMENT TO FORM A YARN PACKAGE ON A MAIN PORTION OF SUCH A BOBBIN, THE ARRANGEMENT OF PARTS BEING SUCH THAT A YARN LINE PROCEEDING FROM A YARN SOURCE TO THE MEANS FOR COLLECTING AND DISPOSING OF THE YARN IS URGED TOWARD ENGAGEMENT WITH SAID TRAVERSING GUIDE, A YARN GUIDING AND DEFLECTING MEANS MOUNTED ON SAID STRUCTURE CONSTRUCTED AND ARRANGED TO ENGAGE AND HOLD A RUNNING YARN LINE CLEAR OF SAID YARN TRAVERSING GUIDE AND IN OPERATIVE ALIGNMENT WITH ANOTHER PORTION OF A BOBBIN ON SAID CHUCK, A MOVABLE YARN RELEASING MEANS MOUNTED ON SAID STRUCTURE IN COOPERATION WITH SAID YARN GUIDING AND DEFLECTING MEANS FOR MOVEMENT BETWEEN A FIRST POSITION IN WHICH SAID YARN LINE IS COOPERATIVELY, RELEASABLY ENGAGED BY THE RELEASING MEANS AND THE GUIDING AND DEFLECTING MEANS AND MAINTAINED IN ALIGNMENT WITH SAID OTHER PORTION OF SAID BOBBIN, AND A SECOND POSITION IN WHICH SAID YARN LINE IS RELEASED FOR MOVEMENT INTO ENGAGEMENT WITH SAID YARN TRAVERSING GUIDE FOR GUIDED TRAVERSED APPLICATION ON SAID MAIN PORTION OF A BOBBIN MOUNTED ON SAID ROTATABLE CHUCK, A YARN CUTTING MEANS MOUNTED ON SAID STRUCTURE POSITIONED ADJACENT A RUNNING YARN LINE FOR OPERATIVE ENGAGEMENT WITH SAID WITH WHEN SAID YARN LINE IS IN ENGAGEMENT WITH SAID GUIDING AND DEFLECTING MEANS AND A BOBBIN ON SAID CHUCK, A FLUID PRESSURE MEANS MOUNTED ON SAID STRUCTURE COOPERATING WITH SAID RELEASING MEANS FOR MAINTAINING THE RELEASING MEANS IN ITS FIRST POSITION, SAID FLUID PRESSURE MEANS ALSO COOPERATING WITH SAID CUTTING MEANS FOR OPERATING THE CUTTING MEANS TO SEVER A RUNNING YARN LINE ENGAGED WITH SAID GUIDING AND DEFLECTING MEANS AND A BOBBIN ON SAID CHUCK TO COMMENCE WINDUP OF YARN ON SAID OTHER PORTION TO FORM A TRANSFER TAIL, SAID FLUID PRESSURE MEANS COMPRISING A CONTROL MECHANISM FOR RENDERING SAID FLUID PRESSURE MEANS INOPERATIVE TO MAINTAIN SAID RELEASING MEANS IN ITS FIRST POSITION IN RESPONSE TO OPERATION OF THE CUTTING MEANS, AND A MEANS OPPOSED TO SAID FLUID PRESSURE MEANS AND SUPPORTED ON SAID STRUCTURE IN COOPERATION WITH SAID RELEASING MEANS AND OPERATIVE TO MOVE THE RELEASING MEANS TO ITS SECOND POSITION A PREDETERMINED TIME INTERVAL AFTER OPERATION OF THE CUTTING MEANS SO THAT THE YARN LINE TRANSFER TAIL LENGTH IS ACCURATELY CONTROLLED. 